Vacuum fluctuation effects on hyperonic neutron star matter

2009/10/28 by Ming-Hua Weng, Weng, M. -H., Xiao-Kan Guo +3
Physics and Astronomy · Engineering · #Pulsars and Gravitational Waves Research #Atomic and Subatomic Physics Research #Geophysics and Sensor Technology

paper · pdf · doi:10.48550/arxiv.0910.5334

Abstract

The vacuum fluctuation (VF) effects on the properties of the hyperonic neutron star matter are investigated in the framework of the relativistic mean field (RMF) theory. The VF corrections result in the density dependence of in-medium baryon and meson masses. We compare our results obtained by adopting three kinds of meson-hyperon couplings. The introduction of both hyperons and VF corrections soften the equation of state (EoS) for the hyperonic neutron star matter and hence reduce hyperonic neutron star masses. The presence of the δ field enlarges the masses and radii of hyperonic neutron stars. Taking into account the uncertainty of meson-hyperon couplings, the obtained maximum masses of hyperonic neutron stars are in the range of 1.33M_\odot∼1.55M_\odot.

Related

• Systematic study of scalar, vector, and mixed density dependencies in relativistic mean-field descriptions of hyperonic matter in neutron stars
• The hyperonic star in relativistic mean-field model
• Hyperons in neutron star matter within relativistic mean-field models
• Relativistic Mean Field Study of Neutron Stars and Hyperon Stars
• The hyperon superfluidity and the hyperon couplings in neutron stars within the relativistic mean field model